91079693 has 4 divisors (see below), whose sum is σ = 96437340. Its totient is φ = 85722048.

The previous prime is 91079683. The next prime is 91079699. The reversal of 91079693 is 39697019.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39697019 = 31 ⋅1280549.

It can be written as a sum of positive squares in 2 ways, for example, as 69522244 + 21557449 = 8338^2 + 4643^2 .

It is a cyclic number.

It is not a de Polignac number, because 91079693 - 2¹² = 91075597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91079699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2678798 + ... + 2678831.

It is an arithmetic number, because the mean of its divisors is an integer number (24109335).

Almost surely, 2^91079693 is an apocalyptic number.

It is an amenable number.

91079693 is a deficient number, since it is larger than the sum of its proper divisors (5357647).

91079693 is a wasteful number, since it uses less digits than its factorization.

91079693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5357646.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 91079693 is about 9543.5681482347. The cubic root of 91079693 is about 449.9254082125.

The spelling of 91079693 in words is "ninety-one million, seventy-nine thousand, six hundred ninety-three".